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Homemade Tube Preamp Schematic
If you spend most of your working with electronics, you'll probably get bitten by the DIY bug. Musicians, for example, seem to spend a lot of time fixing broken equipment. It's a short jump from there...
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Audio Amplifier Components
The goal of an amplifier is very easy to understand. It is a device that takes a very low sound input, and converts it to a high sound output. The output is fed to a speaker, so it can be heard with...
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How to Filter DC Noise
A whining sound in your car’s radio is likely to be DC noise from the alternator, especially if the pitch of the noise changes with engine speed. Uncommon in most modern cars, the noise is generally...
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How to Use a Mixer With an Amp
An audio mixer lets you blend multiple sound sources and output the finished signal to an amplifier and connected speakers. Mixing boards large and small have a master output that sends the audio...
View ArticleInstructions for Bridging a Home Audio Amplifier
Bridging your home audio amplifier can combine the power being sent from multiple output channels to your speakers. If you are bridging a four-output channel amplifier, you can double the power that...
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How to Change Tubes in a Fender Deluxe
The Deluxe line of Fender tube amplifiers has been popular since its initial release decades ago. There are many variations and reissue designs, but the '65 reissue of the Deluxe Reverb remains one of...
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How to Charge a 400V High Voltage Capacitor
In most electronics textbooks, students can read that capacitors store a charge, which can later be released. Unfortunately, this is completely wrong. Capacitors do not store charge, but rather energy...
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How to Choose a Stereo Amplifier
Stereo amplifiers are used in combination with speakers on music systems to enhance the volume as well as the quality of sound. Choosing the right stereo amplifier will require you to consider a wide...
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How to Bias a Fender Super-Sonic Amplifier
The Fender Super-Sonic amplifier line has been updated multiple times since it was first introduced to the market. It is available as a combo amplifier with a reverb option or a la carte as a head with...
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How to Calculate the Power of an Amplifier to the Size of Room
Calculating the amplifier size needed for an audio system is the sum of many factors. Speaker efficiency, room size and how loud you like the sound relative to the other two factors make the...
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How to Repair a Yamaha Amp
Yamaha power amplifiers are used in professional audio environments around the world. Power amplifiers act as a medium between electrical outlets and PA speakers or mixers. You can repair a Yamaha amp...
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How to Use a Digital Voltmeter to Check a Bad Pickup Coil
Electric guitar pickups comprise a coil of wire that winds around six or more magnetic "poles." Pickup styles vary by manufacturer, but the two basic designs are single-coil and dual-coil. You can use...
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How to Install a Marshall Amp Power Switch
The power switch might begin to fail in Marshall guitar amps that have undergone consistently heavy use. Whether the amp has been used for long days on the road, or is simply worn from the constant on...
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How to Connect a Direct Box DI
A direct injection unit, commonly referred to as a DI, is used to convert a line level input, such as a musical instrument, into a microphone level input. This is useful, for example, when a mixing...
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How to Build a Stereo Hi-Fi Tube Amplifier
An audio signal can be amplified in two ways: with tubes or with transistors. Tube technology was superseded in the 1950s by the more efficient and reliable transistor. But many high-specification...
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How to Wire a Paging System
A paging system uses a microphone as a voice input device and an amplifier wired to speakers that are distributed within a local area such as inside a building, school or office to broadcast an audible...
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How to Clean a Volume Control
Older stereos use a volume-control knob to control the volume coming out of the speakers or the headphones. If you would like to clean the volume knob or the casing under the knob, you will need to...
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How to Convert From Dolby 5.1 to 7.1
More people are transforming their living rooms into veritable theaters for better enjoyment of home movies, television, DVDs and video games. Surround-sound systems are a centerpiece in many home...
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What Causes a Stereo Receiver to Turn Off?
Stereo receivers are designed under normal circumstances to drive one pair of speakers. Typically, a conventional setup like this offers years of trouble-free use. However, a variety of things cause...
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How to Connect an Amplifier to a Pioneer Receiver
Pioneer Electronics, a Japanese company founded after World War II, has produced radio receivers, record players, tape players and CD players, among its broad line of products. Amplifiers allow you to...
View ArticleHow to Program a Denon Remote
Denon is a manufacturer of different audio and video devices for your home entertainment needs. Programing the channels into your remote makes listening to your favorite stations easier, especially...
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Can You Hook Up Tweeters to the Same Amp As a Subwoofer?
Subwoofer amplifiers provide your speakers with all the power they need to shake the earth. A subwoofer reproduces very deep, low-frequency bass sounds, from 20 to 200 hertz. They are usually 8 to 12...
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How to Test Guitar Amp Capacitors
Guitar amplifiers magnify an incoming sound signal through speakers. Capacitors level the incoming electricity to reduce variance and enable high voltage discharge greater than the incoming electrical...
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How to Determine How Many Watts You Are Pushing to a Speaker
Finding the wattage being driven through the speaker driven can be accomplished by using the power equation P = (E*E)/R. P is power in watts, E is voltage being provided by the amplifier, and R is...
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How to Troubleshoot an Audio Amplifier Using an Oscilloscope
An oscilloscope is a device for testing electrical currents, specifically to display for observation the shape of the signal wave. In audio amplifiers, you can use a scope to check for incorrect...
View ArticleWhat Is the Function of the Emitter in the Transistor?
In the same way a small amount of force on the handle of a water faucet can regulate a large amount of water, the transistor is a device that allows a small amount of current into its base to control a...
View ArticleHow to Change AUX Input to a USB Port
An RCA cable plug is typically used for transmitting video or audio to electrical devices that have RCA connections. To use an RCA plug with an auxiliary ("Aux") input on a device such as an amplifier...
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How Can I Know If My Amplifier Is Fried?
An amplifier's job is to power an audio signal so that it is strong enough to drive the speakers. There are multiple components inside your amplifier, including power transformers, fuses, resistors,...
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How To Fix a Blown Amp
Amplifiers are devices that power everything from guitars to stereos. The amplifier works by increasing the power of a signal, allowing that signal to be heard through speakers. Amplifiers are...
View ArticleHow to Change a Crate Limo Battery
The Crate Limo is a small, portable amplifier that uses a rechargeable battery for power. This amplifier features a 10-inch speaker with a strong outer case that may be positioned in any number of...
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What Is the Difference Between Class A & Class B Amplifiers
The world of electronics, with its technical terms and specifications, can be more than a little confusing for the novice. When you go shopping for stereo equipment, one of the terms that you're likely...
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How to Design Enclosures for Heat Dissipation
When you design an enclosure for electronic equipment, for every drop of 10 degrees Celsius or 18 degrees Fahrenheit you can expect double the life expectancy before failure. The size and material of...
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What Is Input Sensitivity on Audio Amplifiers?
If you want to get the most out of your audio amplification setup, adjusting your input sensitivity is of paramount importance. Whether you’re dealing with a home, car or musical instrument audio...
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What Is a Class AB Amplifier?
From your alarm clock, to your car radio, to the public address system that lets you hear your favorite band onstage -- a contemporary lifestyle sees you surrounded by electronic amplifiers. With all...
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What Is a Sony 1000ESD Audio Processing Control Amplifier?
The Sony TA-E1000ESD digital processing control amplifier -- sometimes called just the Sony 1000ESD -- is a preamplifier and processor for a home-theater system. Dating back to the late 1980's, this...
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Hooking an Amp to a Radio With an RCA Jack
Consumer electronics equipment, such as amplifiers and radios, use mainly two types of audio connectors: RCA and 3.5mm mini phone plug. Amplifiers have a set of RCA connectors on the back; a typical...
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Pioneer Home Receivers With Minimum 140 Watts Per Channel
Pioneer offers two models in its Elite series A/V receiver line that reach the 140-watt per channel power threshold. The SC-68 and SC-67 are Class D 9-channel amplifiers that can provide immersive...
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Wattage, Ohms & What to Consider When Buying an Amplifier
Amplifiers are usually rated by how many watts per channel they can output. This wattage is a measure of power output, while the impedance in speakers is measured using ohms. For example, with all...
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What Do the Watts & Ohms Mean on an Amp?
Whether you're looking at a standalone power amp, an audio/video receiver or even a car stereo amplifier, the manufacturer will almost always prominently feature a watt per channel rating and, in fine...
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How to Fix an RCA Connector Amp
If an RCA connector on your amp has shorted, you can repair it yourself at home. You may need to buy some of the necessary tools, but once you have them, you'll have the means to repair similar...
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How to Calculate Audio Amplifier Gain
Amplifier gain is a measurement of the change in an AC signal's strength from the input of an amplifier to the output. An electric guitar and amplifier provide a good example of gain. As stated by...
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How to Wire a Preamplifier
Preamplifiers are system hubs, where all the source devices, such as CD players and turntables, converge. Preamps also are the signal distribution centers, connecting to external amplification....
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How to Set Up Home Audio Amplifier Diagrams
Modern home amplifiers provide additional oomph for home theater and audio systems. Most amplifications systems connect in a standardized way, which is great news for those wanting to swap an existing...
View ArticleThe Peavey MP-4 Specifications
The Peavey MP-4 is a four channel mixer that can route the sound of four instruments or microphones through one common processor before it is sent to external speakers. The MP-4 includes a frequency...
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QSC 1500A Power Amp Specs
The QSC MX 1500a is a high-quality amplifier that will ensure maximum power output while operating in extreme conditions. The MX series provides an extensive protection scheme to avoid damaged...
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How to Upgrade a Denon 3806 HDMI
The Denon AVR-3806 amplifier is well suited for use in a home theater setup. The amplifier's firmware can be upgraded by the owner -- it does not have to be returned to the factory or sent in to an...
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The Specs for an Onkyo A-8170 Amplifier
From its output capabilities to its tonal control, the Onkyo A-8170 amplifier offers a piece of equipment for the sound-savvy consumer that provides a variety of solutions for basic audio necessities.
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How to Add Songs to Taijin Karaoke
Taijin Karaoke systems allow you to add songs as often as you like, so that you never feel stuck singing the same tunes over and over. Of course, you may want to keep beloved songs as you learn new...
View ArticleYamaha DSP 1000 Specs
Yamaha offers several amplifiers that feature Digital Soundfield Processing (DSP). When the first unit, the DSP-1, was released it featured controls that allowed users to adjust the parameters to the...
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How to Connect 6 Speakers to 4-Channel Amps
Stereo amplifiers can come with a variety of different output options, including the number of speakers they can connect to. If you have an amplifier that is designed to take only four speakers, it is...
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